DE2121345A1 - Adjustable bracket for glasses - Google Patents

Description

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■ \, _i7z April 23, 1971

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Parmelee Industries, Inc.

Adjustable bracket for glasses

The invention relates to an improved temple part for all types of glasses.

An ever increasing value that is placed on the safety of the eyes results in an increasing Use of glasses, not only for vision correction, but also for eye protection. Especially in industrial use It is important that safety glasses have adjustable straps to allow the industrial branch to use one Keeping stocks of glasses of only one size, thereby reducing the cost of spending on an inventory of different glasses Sizes to avoid. In certain cases, it is also desirable to have glasses that are adjustable to fit to be adapted for use by more than one person. A significant advantage in eyewear design is given by U.S. Patent Application No. 761,990.

It is an important object of the present invention to provide an extendable and infinitely adjustable bracket for To create glasses that do not loosen any fasteners before changing the length of the temple requires.

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Another object of the invention is to provide an adjustable temple for eyeglasses in which a pair of temple front and back Rear sections is held in tight engagement when they move the temple sections in one of countless positions are located"

An equally important object of the invention is to provide a to create adjustable temples for glasses that use a body made of permeable, resilient material to hold a Lock pair of bow front and back sections.

It is also an object of the present invention to provide a temple as described, in which the body from compliant material eliminates all critical tolerances between the relatively movable bracket sections.

It is also an object of the invention to provide an adjustable temple for eyeglasses that is unnecessary for an access opening to the interior of the bracket, thereby avoiding the possibility of dirt in the Stirrup enters and affects the components that are movable relative to one another.

The invention provides a pair of elongated bow front and back sections which are connected by means of a connecting rod in FIG mutual engagement which extends through a body of resilient material. When the connecting rod slides through the resilient material, it causes one Expansion of the surrounding material to the extent that the rod and body are held in tight engagement, thereby reducing the Sections are joined together except while adjusting the length of the bracket when a force is applied is used to move the rod within the resilient material »

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Further advantages, features and possible applications of the invention emerge from the attached illustration of exemplary embodiments and based on the following description ο

It shows:

Figure 1 is a perspective view of glasses with a pair of adjustable temples,

Figure 2 is a side elevation of one of the adjustable brackets with the cover plate removed for illustration;

Figure 3 is a disassembled perspective view of the bracket section according to Figure 2,

Figure h is a perspective view of the body of resilient material locking the bow front and back portions, illustrating the manner in which the material is pierced to obtain a guide passage;

Figure 5 is a perspective view similar to Figure 4, after the piercing rod has been removed from the material and

FIG. 6 shows a cross section along the line 6-6 of _{FIG. 1 of} FIG. 2.

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A conventional spectacle part is in figure 1 indicated at 10, this spectacle part has a pair of adjustable strap 12, which are mounted in conventional manner on the spectacle frame 10 _o Because both bracket 12 are identical, in the following only one will be described.

According to FIGS. 2 and 3 it can be seen that each of the brackets 12 has an elongated front bracket section 14 which receives an elongated rear bracket section 16 in a telescopic manner. The front temple portion 14 has a hollow interior and is generally U-shaped in cross-section nearly half its length to permit it to telescopically receive the rear temple portion 16 "One end of the front temple portion 14 presents an opening 18 for the insertion of the rear temple portion 16" the left Half-side of the bracket section 14 according to FIGS. 2 and 3 is constructed with an integral solid reinforcing insert 20 which has a slot 22 which extends longitudinally? extends and is arranged centrally for reasons to be explained later. "A vertical wall 24 spans the distance between the side walls of the hollow U-shaped part of the bracket section 14 and cooperates with the side walls as well as with the end edges of the insert 20 to -." ine To form pocket within section 14-

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A body 26 of resilient material, which can be any of a number of thermoplastic or rubber can be based components and preferably consists of vinyl plastic, provides an elastic mass with a slightly larger horizontal cross-sectional area than the corresponding cross-sectional area of the pocket in the Bracket portion 14 illustrates "The body 26 is preferred to form a guide passage 28 therethrough This is done in the manner illustrated in FIG into the body 26 and retracting the same. Because no material is actually removed during piercing the resilient material closes around the guide passage 28 after removal of the rod 30, which is desirable for reasons to be explained later.

The bail back portion 16 has an elongated connecting rod 32 attached to it and extending longitudinally therefrom towards the bail front portion Outside the disc 33 and rod 32. The vertical wall 24 represents a guide channel 34 which guides the connecting rod 32 into the guide passage 28 when the section 16 _? is received telescopically by the section 14. As the connecting rod 32 slides through the body 26, it is received in the slot 22. An end plate 37 is attached to the bracket section 12, preferably by ultrasonic welding, in order to seal the entire arrangement within the section 14.

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The bracket back portion 16 is with a plurality of Numbers 38 are provided which are visible to the user when the temple back portion 16 with respect to the front portion 14 is moved to adjust the length of the bracket 12 o When the connecting rod 32 is within of the guide passage 28, it causes the surrounding material of the body 26 to expand in a hatred, in order to keep the rod in a tight enough engagement with each other to keep the body to lock sections 14 and 16 together, except while adjusting the length of the bracket, if any Force is applied to the rod 32 within the resilient mass represented by the body 26, to move. The fact that the body 26 has a slightly larger cross-sectional area than the corresponding area the pocket within section 14 causes a slight compression of the body when it is in the pocket is introduced. This facilitates the retention of the body 26 within the pocket and also provides another Contraction of guide passage 28 to tightly engage the resilient material with the connecting rod 32 to ensure.

The assembly of the bow front and rear section includes sliding the disc 33 onto the rod 32, after which the rod is crimped to have a flattened portion 35. The body 26 is in the. Bag.des Section 14 pressed after the guide passage 2 & was formed in it, and the rod 32 is inserted through the opening 18 in the body 26. After the pole has passed the body 26, a downward force is exerted on the portion 16 to keep the body out of ssiner

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O This allows the washer 33 to be lifted along the Rod 32 to be moved to a position where a subsequent Reinserting the body 26 into the pocket of the section sandwiching the disc between the body and the wall 24, as shown in FIGS. 2 and 6 = This prevents the rod 32 from being removed from the body 26 when the both sections 14 and 16 are moved relative to each other.

A particular advantage of the frame construction described herein is the elimination of any need for retaining means verrigeln the two movable strap sections relative to each other to each other, zi disengage or release, whereby an adjustment is possible by simply applying a force in the direction in which a Movement of the bracket back portion 16 is desired. It is also advantageous that the body 26 of resilient material which interlocks the front section 14 and rear section eliminates the critical tolerances normally required between moving parts. While the guide passage 28 is preferably made with a rod 30 of the same diameter as the connecting rod 32, a slightly smaller or larger piercing rod may be used from the connection? As best seen in Figure 6, the sealed construction of the bracket 12 not only facilitates the retention of the body 26 in the aforementioned pocket, but also prevents the ingress of contaminants

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into the hollow interior of the section 14, which could affect the movement of the connecting rod 32 in the guide passage 28.

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Claims (1)

Claims Adjustable temple for eyeglasses, characterized by a pair of elongated temple front and temple back portions , the rear portion being longitudinally displaceable with respect to said front portion to allow selective positioning of the rear portion to adjust the length of the temple, through a body of resilient material carried by one of said sections and constituting a resilient mass , and by an elongate connecting rod connected to and extending longitudinally from the other of said sections , said rod extending through said mass and expansion of the surrounding material to an extent causes the rod and body to be held in sufficiently tight engagement to lock the sections except while adjusting the length of the bracket when a force is applied to the rod to move within the crowd. 2ο bracket according to claim 1, characterized in that said mass is pierced in order to form a passage into which said rod e: Äj £ e is ο 109849/0 173 2 1 2 1 3 A 5% - no - 3. bracket according to claim 1, characterized in that the bracket front portion has a pocket to to receive said body, and in that the pocket has a smaller cross-sectional area than the cross-sectional area of said body, whereby the latter is squeezed when inserted into the pocket, 4. bracket according to claim 3 »characterized in that the Pocket represents a guide channel around said connecting rod in said guide passage to lead » 5. bracket according to claim 3, characterized in that the bracket front and rear section telescopically into one another are accommodated for movement along their longitudinal axis and that a finishing lath in one Cover sheet is arranged on the bow front portion, whereby a retention of said body in the said bag is relieved. 6. bracket according to claim 1, characterized in that bracket front and rear section telescopically a ■ in the other is incorporated for movement along their longintudinal axes. 7. bracket according to claim 1, characterized in that the resilient, expandable material is a vinyl plastic. 109849/0173 8. bracket according to claim 3, characterized in that a retaining disc is provided by the said rod is excluded that a holding device /; on said rod is provided for disengagement the said disc with the said rod closed prevent, and that the disc is sandwiched between said body and said pocket, whereby removal of said rod from said body is prevented. 109 8-97-173 Blank page